Sacrificial anode



FIG. 1 is front, perspective view of a sacrificial anode in accordance with the present invention;

FIG. 2 is a top, elevational view of the sacrificial anode shown in FIG. 1;

FIG. 3 is a bottom, elevational view of the sacrificial anode shown in FIG. 1;

FIG. 4 is a right side, elevational view of the sacrificial anode shown in FIG. 1, with the left side view being a mirror image thereof; and,

FIG. 5 is a front, elevational view of the sacrificial anode shown in FIG. 1, with the rear view being a mirror image thereof. 

The ornamental design for a sacrificial anode, as shown and described. 